OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Honda Engines HONDA HRU19

Hi, am having a slight problem with my mower. It is a Honda hru19 buck with a 160 engine, not sure if GCV or GXV. Will start first or second pull, runs perfectly but if i switch it off within 5 minutes of using it, it will not start again until cooled down. It is one of those that has a lever with a brake to the flywheel,, and worse yet, a carby that you cant do anything to. It has an automatic choke( has no throttle lever ). Have done all i can think of, cleaning carby, new spark plug, air filter, even took valve cover off to check valve gaps, all good there.
Any help or advice will be appreciated,
Paul

Some photos would be helpful, but i'm guessing there's a problem with the auto choke setup. It may be choking itself when you turn it off and hence won't restart til it cools down.
Do you know if the choke is controlled by a bi-metallic thermostat or some other tupe of system?

Engine serial number should help determining which Honda engine was used and help in troubleshooting your problem.

Hi Bigted and AVB,, i think i have sorted out the problem. Got up early this morning and went through the full running of the mower. Bigted, you were on the right track. i started the mower without the air filter on and carefully watched the choke butterfly. Even after the mower had warmed up, running for approx 5 mins, i noticed that the choke was not fully opening, was able to open with my finger on the choke control arm which helped the mower run a bit smoother. I have come to the conclusion that the wax cylinder with the piston is no longer any good. As the piston is not coming fully out, the choke is therefore staying on. Am going to change it and see how it goes,, will let you know how i go.
Paul.

Hi Bigted and AVB, got it sorted. It was the wax cyclinder that was no good. Put in my new one, warmed up the mower,approx 5 mins, while watching choke. Opened up perfectly. Will start up straight away again. I proceeded to have a good look at my old cyclinder with my jewelers glasses, and would you believe it, a tiny pin hole in it, which i gather had allowed some of the wax to escape and not push the piston out.
Thanking you
Paul.

Thanks for the update and glad you found the actual source of the problem. I didn't know that Honda used a wax pellet system as I would thought it would have been a bi-metal type thermostat.

I don't see many Honda mower engines here as most are Briggs or Honda clones (Chondas). Only been servicing small gas engines for a little over 9 yrs now for customers. lots to learn still.

Great result there Paul, and thankfully an easy fix.
I'll now close this thread and if anyone has anything to add contact a moderator